[common/logging] Simplify logging logic and fix issues when logging before system is created (#3688)

- our logging code was bigger than spdlog itself, why???? just keep it simple
- fix issues when logging before logging system is even started
- removes the "initialized logging twice" issue
- removes uneeded indirection in file logging
- uses direct formatting instead of jumping hoopla-around the fmt::format() ressult
- code duplication and dead code removal as usual

I did explore dup2() but I think it's not worth the hassle
I did try `fwopen()` but it's better if things are just kept as-is.

there is a lot of noise because I removed a bunch of redundant files on logging and just put everything in one file

now normally this wouldn't be a good idea, however consider: the complexity of logging; it's less than 500 lines... does it really need a whole subsystem?!?!?! ITS JUST LOGGING

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3688
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: DraVee <chimera@dravee.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

src/video_core/vulkan_common/nsight_aftermath_tracker.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -16,7 +19,7 @@
 #include "common/fs/file.h"
 #include "common/fs/fs.h"
 #include "common/fs/path_util.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/scope_exit.h"
 #include "video_core/vulkan_common/nsight_aftermath_tracker.h"
 

src/video_core/vulkan_common/vulkan_debug_callback.cpp

@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #include <string_view>
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/settings.h"
 #include "video_core/vulkan_common/vulkan_debug_callback.h"
 #include "video_core/gpu_logging/gpu_logging.h"

src/video_core/vulkan_common/vulkan_device.h

@@ -14,7 +14,7 @@
 #include <vector>
 
 #include "common/common_types.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/settings.h"
 #include "video_core/vulkan_common/vulkan_wrapper.h"
 

src/video_core/vulkan_common/vulkan_instance.cpp

@@ -12,7 +12,7 @@
 
 #include "common/common_types.h"
 #include "common/dynamic_library.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include <ranges>
 #include <vulkan/vulkan_core.h>
 #include "core/frontend/emu_window.h"

src/video_core/vulkan_common/vulkan_library.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -5,7 +8,7 @@
 
 #include "common/dynamic_library.h"
 #include "common/fs/path_util.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "video_core/vulkan_common/vulkan_library.h"
 
 namespace Vulkan {

src/video_core/vulkan_common/vulkan_memory_allocator.cpp

@@ -16,7 +16,7 @@
 #include "common/assert.h"
 #include "common/common_types.h"
 #include "common/literals.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include <ranges>
 #include "video_core/vulkan_common/vma.h"
 #include "video_core/vulkan_common/vulkan_device.h"

src/video_core/vulkan_common/vulkan_surface.cpp

@@ -4,7 +4,7 @@
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "core/frontend/emu_window.h"
 #include "video_core/vulkan_common/vulkan_surface.h"
 #include "video_core/vulkan_common/vulkan_wrapper.h"

src/video_core/vulkan_common/vulkan_wrapper.cpp

@@ -11,7 +11,7 @@
 #include <vector>
 
 #include "common/common_types.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "video_core/vulkan_common/vk_enum_string_helper.h"
 #include "video_core/vulkan_common/vma.h"
 #include "video_core/vulkan_common/vulkan_wrapper.h"